Tools, Forms, Guidance, and Links for Wetland Delineators
Delineation Methods: Approved for Washington State
Washington Wetland Rating Systems: Rapid Functional Assessment Method
Data Forms: Delineation and Rating
WSDOT uses the following customized fill-in data forms:
WSDOT Delineation Guidance
Other Guidance for Washington
- National Wetland Plant List web page (NWPL) (Corps of Engineers)
- For plants commonly found in WA, WSDOT uses simple codes instead of the full scientific name to record field data. A plant code list (pdf 290 kb) (WSDOT 2014) provides the scientific and common names, origin, and the indicator status of based on the NWPL (Version 3.2).
- WSDOT developed a corresponding auto-text macro for Microsoft Word (WSDOT 2014) that inserts the same information from the plant codes. Installation instructions, the plant codes and the macro file “Autotext_Plants.dotm” can be obtained from the public FTP server (or the WSDOT internal FTP server).
- The Regional Supplements recommend using the methods described in Chapter 19 of the USDA NRCS Part 650 Engineering Field Handbook to determine if antecedent precipitation is normal.
- The University of Washington web page provides precipitation data from 1996-2008 with graphs.
- The U. S. Geological Survey StreamStats in Washington Interactive Map can be used to determine the area of a watershed upstream of a given point. This map is useful for many functional assessment methods, including question D 3.3 in the Western Washington Rating System. Instructions on using the Interactive Map are available from the User Instructions link in the green box on the Stream Stats page. Selecting a site and delineating a watershed is the 4th topic on the User Instructions page. The tool becomes available at scales of 1:24000 and greater, and your Pop-up blocker needs to be turned off.
- WSDOT installs shallow groundwater monitoring wells in accordance with the guidance available in the Wetlands Regulatory Assistance Program Technical Notes Corps of Engineers web page:
-Noble, C. 2006. "Water Table Monitoring Project Design"
-U. S. Army Corps of Engineers. 2005. "Technical Standard
for Water-Table Monitoring of Potential Wetland Sites"
-Sprecher, S. W. 2000. "Installing Monitoring Wells/Piezometers
Optional methods to evaluate functions. Other methods may also be appropriate for use.